Find out what congressional district you are in; then contact your representative.
They have assistants read all mail from constituents and do send a form thank-you back. Don’t expect any personal contact.
Why not join a politically active group such as The Sierra Club? They have thirteen different chapters in CA alone. The club has a lot of clout because of the size of its membership, the power of its board and the size of its purse.
http://www.sierraclub.org/ca/
Here is their legislative lobbying arm in CA.
http://sierraclubcalifornia.org
CA’s priority environmental issues.
http://sierraclubcalifornia.org/issue-areas/